JPS5577917A - Controlling method for rolling mill - Google Patents

Abstract

PURPOSE: To simultaneously control the shape and edge drop of the rolled material, by making the intermediate roll's axial directional position to be constant between the noncontrolling point and the edge drop minimum point.

CONSTITUTION: The noncontrolling point δN, the roll bending force FN, and the roll crown CRN are determined by the computer 5 and are inputted to the operators 6, 10, 14. The operator 6 operates the correction value ΔδU, ΔδL, from δN and the detected values δU, δL, of the detectors 7, 7', for the intermediate roll's axial directional position, and inputs them to the roll's axial directional position controller 8; hereby, the roll's axial directional position shifters 9, 9', are operated for always controlling the roll's axial directional position to coincide with the intermediate roll's axial directional position. The operator 10 operates the correction value from FN and detected values of the roll bending force detector 11, and inputs it to the controller 12, which then controls the roll bender 13 so as to make the roll bending force to be FN. The operator 14 determines the quantity of heat ΔQU, ΔQL, to be distributed to upper and lower rolls from the detected value ΔCR of the roll crown fluctuation detector 15, and inputs it to the heating controller 16, which operates the heater 17 controlling the heating elements 18, 18', so as to make the roll crown to be CRN.

COPYRIGHT: (C)1980,JPO&Japio